Vented motor casing



' R. F. PAGE.

VENTED MOTQR CASING Flled Aug '7 1925 Sept. 1 3,

Patented Sept. 13, 192'17'.'

- UNITED STATES p ATENT Olin-C115;

ROBERT E. PAGEQDECEAsEnTATE OE ATHENS, PENNsYIiVANIA;v BY JOHN MQEEET, ADMINISTRATOR, ror ATHENS, PENNSYEVANIA,` AsSIeNoR To INeERSoLIi-RAND COMPANY, or JERSEY CITY, lNEwJERSEY, A CORPORATION OE NEW JERSEY.

YENTED MOTOR CAsINe. o

. "Atpnatio'meu August '1,v 1925. serial No. 48,755.

This invention relatesto motors, and more particularly to ventsk kfor motor casings which are adapted toseparate oil from the air, permitting air to pass out of the casing while the Oil is-retained within the casing.A

Within motor casings and more particuf `larlyrin pneumatic motor casings almostalways' a pressure develops which is partly due to leakage around the motor piston orto the pumping action'of the pistons. Thisair pressure should4 be vented to atmosphere in order to avoid pressure within'vthe casing.V

This would be simple were it not for thefact that the casings are partiallytilledwithoil which would be blown out ofthe usual vents very easily, resulting in the loss of oil and the disagreeablel continual oiliness on the outside of the tool itself.

It is an obj ect of this invention to vent the casing to atmosphere and to separate the oil from the air passing through the vent so as `to be retained within the casing. Y

Cther Objects and advantages of the invention will be in part obvious and in part pointed out hereinafter.

In the drawing showing an embodiment of the invention and in which similar reference characters refer to similar parts,

Figure 1 is la side view of a rotary drill,

and oil separator for the casing, and y Y Figure 2 is a sectional view of the oil Separator. v Y

Referring to the drawings, the motor comprises a plurality of cylinders YA and pistons B arranged to reciprocate therein and operatively connected to a crank shaft C housed lwithin a casing'D upon 'which the cylinders o A are mounted. Thecrank shaft C, in this 40. case, is adapted to rotate a spindle'V E through suitable reduction gearing (not shown). Thetool` shown is a rotary drill preferably operated by compressed air admitted through a throttle handle F. A plate Cr forming one of the side walls of the casing ksupportsa breast plate H in alignment with the spind`e E so that the tool may be held against the work. y Y

Tools of this description are lubricated by partially filling the casing D with an oil, preferably of heavy body. It isimpractical to manufacture the pistons B so that they are absolutely air tight within the cylinders portionsr being insection to show the vent.

A and therefore air leakscontinually from the cylinders into the casing D.

order to relieve the pressure of the leakage air within the casing D so that oil willnotbe forced thereby out alongrthe bearings of the spindle E and getonto the work, a vent is usually provided.' One dif-A ficulty Aencountered with Avents' in the casing'is vthat the oil is' blown out through the vent! along with leakage air. This ispre-YK vented in the present invention by a tube J extending .from 'the interior of the casing through the wall Cr and closed at'one end as shownat K,`-ther`e being] an apertured Lhollow Vdisk L mounted over perforations P intermediate the ends of thetube J and located in the interior of thecasing. The,

. tube J may be screwed or otherwise secured in the rear wall G in axial alignment with the crank shaft. The disk L forming the grease separator is bodily rotatable and is rotatably Vmounted directly on the outside of the tube J and consists, inthis instance, Oftwo perforated members Q and R attached at their periphery as by turning over the projecting edges S.

Y The member R of the disc is provided with an aperture T to receive a stud U which forms an operative connection between the crank shaftl C and the oil sepa-- rator for rotating the latter at high speed. The stud U extends laterally from the crank pin V of the shaft C and is secured thereto by means of a lock nut WV.

`The pistons B rotater the crank shaft C by mea-ns of piston rods X. One end ofthe connecting vrod 'X is ball shaped, as at Y, to engage a socket Z in the piston B. The other end of the connecting rod kpartly encircles a connecting rod sleeve 7) vand is held thereon by means of connecting rod rings c.' A washer d secured to the vcrank pin V by the nut W holds the rings andr ffll tlm do@ L 1151s nnnmtod thereto :l rotary motion by lilo xfoollon oil lille lloc Wluoll,

@Husos partici-los ol oil in the nll lo bov thrown by oontriilfugul nozun liowwcl lill@ pol'pllory ol? the liso nml thence book ou Gln-(nigh lll@ pol'ltnullcms lu the (liso Into t'llo Casing D,

I Claim:

l. motor comprising n cylinder mul piston. :1 crunk Slnllfl' (nnnotwly oonnoclzorl with tho pistou, n, casing; housing; smul c'lnnk Sl1u1l't-;ul l nuppoliug; tho cyllnflox, :1 Yom: tubo closed al ono onfl und oxlomllng tln'ougljll the 110:11' woll o'l" the omging; in axial ullgnmontw'iltll illu-Cnil ol `tlm ol'znll; slurlfl, mill fullo having purloxulions nlolnosilioto il@ lough,Communicating willy l'llo lulorlol of llxoonsug. o hollow pol-fo Atoll llink bollily` rotatable ou Saul lull@ oppositotlw mul ol? tho Ll'unl; .Qlnll'lnnl lnountocl dllool'ly n mul lube over Soul pollozotlonmmoons for' llolflingr sind flfslllnst longilncllnnl ulovomonl' on tlm tubo. und :L stud oullo crook shaft engaging ,will (llol lo bodilyv rotolo the disk on the tubo ubout` the :Driss ol `the crank Shaft.

mimosa 

